Improvements in or connected ith ecraseurs or like instruments for castrating, and for other purposes / [James Arnold].

  • Arnold, James.
Date:
1896
Catalogue details

Licence: Public Domain Mark

Credit: Improvements in or connected ith ecraseurs or like instruments for castrating, and for other purposes / [James Arnold]. Source: Wellcome Collection.

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    5 10 15 20 25 30 35 40 N° 20,128 Date of Application, 25th Oct., 1895 Complete Specification Left, 25th July, 1896—Accepted, 29th Aug., 1396 P HO V [SIGNAL S P LG IFI GAT 10 N. Improvements in or connected with Ecraseurs or like Instruments for Castrating-, and for other purposes. I, James Arnold of the Firm of Arnold and Sons of 31 West Smithfield in the City and County of London, Surgical and Veterinary Instrument Makers, do hereby declare the nature of this invention to be as follows ;— Instruments for castrating and other purposes known as Ecraseurs have been heretofore constructed with a screwed motor shaft, rotated by a liandle and caused thereby to traverse a carrier to which the ends of tlie chain arc attached. This carrier has been formed witli a nut with which the motor screw is always in engagement, and loss of time and inconvenience is incurred by the fact that the chain can be tightened but slowly by rotatiiig the motor screw. Now the object of my invention is to so construct the instrument as hereafter described, that the chain may be brought closely around the part to be severed or crushed by a quick action, and this liaving been thus rapidly effected, the action of the motor screw may then immediately be applied for the finish of the operation, witliout any loss of time, by adjusting the screw or otherwise. To this end T provide a tubular stem with length way slot as usual, but I fit the motor screw with collars or shouldeis so that it may have a rotating but not endway motion. The ends of the chain are gripped and held to the carrier in any convenient manner say by a screw, spring, or equivalent means with a terminal knob or handle, and the said carrier I fix or form with a tubular sleeve located within the stem, through which sleeve the motor screw freely passes. This carrier sleeve is plain on its interior, but is slotted, say on two lateral sides, and above these slots are provided spring teeth formed with partial threads, so that upon the teeth being pressed through the slots the carrier will be locked to the motor screw and be traversed by its rotation. Over the carrier sleeve is a laterally slotted tube adapted to be slidden length¬ ways thereon by means of a handle passing through the lengthway slot of the tubular stem ; the slots in the said tube are so arranged that when in one endway position the spring teeth are pressed into engagement with the screw, and when in the other position the teeth are out of engagement. By apparatus constructed according to my invention the chain may be adjusted into position, and the spring teeth not being in engagement with the motor screw, the carrier may be seized by the knob or handle and the slack of the chain taken up ; this having been done the spring teeth are forced into engagement with the motor screw, by sliding the slotted tube by means of its projecting knob or handle, and the screw may then be immediately and effectively operated to tighten the chain without any loss of time or inconvenience, and it should also be noted that the handle by which the motor screw is operated has no endway or lengthway motion whatever. During an operation with this instrument a further advantage is that should the chain require adjustment or removal the same can be instantly done by simply sliding the knob or handle in the reverse direction. Dated this 25th day of October 1895. BREWER & SON, London and Leeds, Agents for Applicant. [Price 8J. |